import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      {path: '/welcome', component: Welcome},
      {path: '/users', component: Users},
    ]
  },
]

const router = new VueRouter({
  routes
})

// 挂载路由守卫
router.beforeEach((to,form,next)=>{
  if (to.path === '/login') return next() // 如果是登陆页面 ，直接放行
  const tokenStr = window.sessionStorage.getItem('token') // 获取 token
  if(!tokenStr) return next("/login") // 如果没有登陆就重定向到登录页
   next()
})

export default router
